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Sedans Volkswagen Jetta Volkswagen Jetta Engine Questions
274 messages, Last post on Dec 07, 2009 at 10:32 AM
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no codes at ecm and VR6 is supposed tobe good car plenty of power to coil but cant locat ecm signal at coil plug when turning over .2002 jetta VR6 sorry forgot to mension what car my girl is driving. 
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Replying to: whitgallman (Nov 04, 2009 11:48 am) Also, I have seen headlight bulbs act funky like you describe. Try SWAPPING the bulbs from side-to-side and see if problm moves. (this will rule out the bulb as the culprit) If that does not help... you may have to troubleshoot WHILE THE PROBLEM IS HAPPENING to isolate the failing component. |
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2002 VW Jetta 2.0 4 cyl 135,000 miles Car started to sound like it had a bad muffler. Two weeks ago check engine light came on and flashed. Garage stated wires were bad and plugs fouled so I had them replaced. They recommended the ignition coil as well but at $400 for just the part I pasted. Car ran fine. 2 days later the check engine light came on again. I replaced the ignition coil myself. Easy repair. Put the plug wires back as they came out, number 1 in A 2 in B 3 in C 4 in D. Car seemed to be running fine, expected the check engine light to reset after 100 miles and it did not. Still makes that sound if you hit the gas when it is in neutral like the exhaust has a chest cold (only way I can think of describing it) There was a recall on the catalytic converter and was replaced at 85K. Took the car to auto zone and they said the code was for a bad ignition coil still. Unless the garage put the wires back in coil in the wrong, order I am out of ideas. I have the single ignition coil unit not four separate ones like on a V6. Out of ideas...O2 Sensors maybe? I did recently change my brand oil of oil from Mobile 1 Full Syn to Castrol Edge Full Syn. Probably grasping at straws at this point |
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Replying to: dp2226 (Dec 01, 2009 5:40 pm) I am not sure there is a code that says "Bad ignition coil".... It sure looks to me that all of these folks are mis-interpeting what the code is telling them.... As witnessed by the fact that none of them have successfully diagnosed the problem yet. You did a great job of describing the problem and the steps you have taken thus far... perhaps if you tell us the SPECIFIC code, we may be able to help troubleshoot. The MAF (MassAirFlow) sensor on your engine may be going bad. An easy way to check the MAF sensor is to pop the electrical connector from it and let it dangle. (yes - this WILL cause the CEL to light up) Then start engine and drive for a few days. If things are better, then suspect the MAF is bad. Also, check the color of your ECT (Engine Coolant Tempararure) sensor. If it is not GREEN, replace it. (about $15 and the Oring) The ECT of that vintage are KNOWN to go bad and VW came out with a better design which is colored GREEN so it is easy to tell if you have the newer one installed. You cannot tell if the ECT is bad by looking at the guage on the dash because the ECT has 2 sensors within in.... 1 for the dashboard and the other for the EngineComputer. If the computer "thinks" that the engine is always cold, your engine may run like cr  p. Also, you should make certain that the engine is MECHANICALY sound. A compression-test may be a good way to validate that you do not have troubles with valves. (which could also cause this problem)
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Replying to: dp2226 (Dec 01, 2009 5:40 pm) 
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Replying to: dp2226 (Dec 01, 2009 5:40 pm) |
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Replying to: 77camaro (Dec 02, 2009 7:36 am) The 2.0 engine that we are talking about here DOES NOT have COP ignition-units. If there is something "pending" which you are refering to besides the COP units... please append some reference URLS that support that statement. I would be very interested to review those documents because both of my daughters have VWs of that vintage with 2.0L engines.
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Replying to: bpeebles (Dec 02, 2009 12:40 pm)
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Replying to: vwdawg (Dec 03, 2009 8:44 am) |
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Replying to: jeffyscott (Dec 03, 2009 9:00 am)
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